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Finding the Fourth Proportional to 11,805,991.31, 17,668,988.93 and 7,259,919.50

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Solution

The fourth proportional to 11,805,991.31, 17,668,988.93 and 7,259,919.50 is: 10,865,283.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,805,991.31 : 17,668,988.93 = 7,259,919.50 : x
  2. Step 2: Convert to fraction form
    11,805,991.31/17,668,988.93 = 7,259,919.50/x
  3. Step 3: Cross multiply
    11,805,991.31x = 17,668,988.93 × 7,259,919.50
  4. Step 4: Simplify right side
    11,805,991.31x = 128,275,437,340,513.42
  5. Step 5: Solve for x
    x = 128,275,437,340,513.42/11,805,991.31
  6. Step 6: Final answer
    x = 10,865,283.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.